Open terminal, paste
wget -O - https://raw.githubusercontent.com/drweb86/annotator/master/scripts/ubuntu-install.sh | bash
for preview version
wget -O - https://raw.githubusercontent.com/drweb86/annotator/master/scripts/ubuntu-install.sh | bash -s -- --latest
Open terminal, paste
wget -O - https://raw.githubusercontent.com/drweb86/annotator/master/scripts/ubuntu-uninstall.sh | bash